Thanks , but I should have explained better. What I needed to achieve was a way to cause my DLL to plug into an existing application by some other programmer, without having to involve the the other programmer .This way , he wouldn't have to change a bit. There would be only his application with a few MDI child windows created by him, while I hook up to those MDI child windows, I induce the creation of different toolbars for the respective MDI child and intercept all the messages to those windows, thus taking over the MDI children. I achieved it, everything works fine now. As I explained in the former posting, I do receive the rerouted messages. The WM_COMMAND message cannot be intercepted by me, it is intercepted in the MDI child, but I found a way around it. Whenever I create the toolbar, I keep record of the amount of buttons and record the rectangles within the toolbar, where they are located. Now, I need just to catch the WM_LBUTTONDOWN and ..BUTTONUP messages, thus enabling me to detect which button was pressed and take action... Works great ! Thank you for your interest ! Rubi
